What China Means for Japan's Industrial Giants

Japan's Nikkei has had no equal this year, rising to star-studded gains of more than 25% year to date. The index had a tough time getting anything going this week, hanging flat over the past five days despite a great Friday that saw the Nikkei jump more than 2%.

You can thank an unlikely source for that end-of-week gain: China. China's economic slowdown has hit many stocks hard, but Japan's avoided much of the damage, as it's risen behind the falling yen and Prime Minister Shinzo Abe's stimulus. However, many of Japan's top companies are still looking to China for growth and wealth. If China's slumping economy can find its feet -- and these two Asian powers can ward off rising political tensions -- both economies (and investors) will be better off.

A hard ride for Japan's industrial giantsChina's preliminary purchasing managers index reading from HSBC and Markit showed a strong uptick into expansion territory for August. That might not mean a ton for Japan's overall economy, but for select manufacturers relying on China for growth, it's a huge boost.

Take Japan's Komatsu , one of the world's largest construction equipment manufacturers. The weak yen has helped many international companies welcome stronger bottom lines from overseas sales, but even for Komatsu -- a company that has indeed been helped by the yen's plunge against the dollar -- the mining industry's doldrums and China's slide have hit sales far more than the company's earnings have been helped by the yen. Considering China makes up 8% of Komatsu's sales, the company has a lot to lose if the world's second-largest economy remains mired in its slump.

It hasn't just been Komatsu. Manufacturers across Japan have suffered through China's slowdown. Hitachi , one of Komatsu's toughest rivals and Japan's second-largest heavy equipment manufacturer, saw its operating profit fall by around 28% for the first quarter, with the yen's decline not enough to outpace weak sales. Hitachi believes a Chinese rebound is on the way soon, and both Komatsu and Hitachi, along with others in the manufacturing space, have maintained rosy full-year profit outlooks.

Hitachi's lofty projections of a rebound won't matter if Japan and China can't settle their differences, however. China's Commerce Ministry reported that trade between the two Asian powers declined nearly 9% through the year's first seven months. Some of China's reduced imports from Japan have come as a result of economic slowdowns elsewhere in the world -- particularly Europe -- but the countries' war of words over the contested Senkaku Islands has been raging long enough that it's affecting businesses and investors alike.

It's important to point out that it's not just China hitting leading Japanese exports, either. Hitachi was slammed in part because of declining fortunes in India, another of the world's hottest emerging markets that's dealing with problems of its own. Falling demand in Australia and Indonesia also took a bite out of Komatsu's first-quarter earnings.

Nonetheless, China's a critical piece for these two manufacturing leaders, as well as many other top Japanese exporters. The problems have begun to take their toll on Komatsu and Hitachi, as the former's stock is down nearly 15% year to date, while the latter's shares have fallen 12% over the past three months.

The Nikkei might be riding high for the average Japanese investor, but for top exporters like Japan's largest manufacturers, China and other high-priority economies need to lend a hand.

Komatsu and Hitachi may be down now, but one big global bounce could be enough to right these giants and others across the industrial sector. Many global regions are still stuck in neutral, and their resurgence could result in windfall profits for select companies. A recent Motley Fool report, "3 Strong Buys for a Global Economic Recovery," outlines three companies that could take off when the global economy gains steam. Click here to read the full report!